introduce interface AdminCourseWidgetPlugin and adjust core admin courses to it, fixes #3084

Closes #3084

Merge request studip/studip!2071

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/classes/sidebar/AttributesArrayAccessTrait.php b/lib/classes/sidebar/AttributesArrayAccessTrait.php
new file mode 100644
index 0000000..7bea834
--- /dev/null
+++ b/lib/classes/sidebar/AttributesArrayAccessTrait.php
@@ -0,0 +1,44 @@
+<?php
+trait AttributesArrayAccessTrait
+{
+    public $attributes = [];
+
+    /**
+     * @todo Add bool return type when Stud.IP requires PHP8 minimal
+     */
+    #[ReturnTypeWillChange]
+    public function offsetExists($offset)
+    {
+        return isset($this->attributes[$offset]);
+    }
+
+    /**
+     * @param $offset
+     * @return mixed
+     *
+     * @todo Add mixed return type when Stud.IP requires PHP8 minimal
+     */
+    #[ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->attributes[$offset];
+    }
+
+    /**
+     * @todo Add void return type when Stud.IP requires PHP8 minimal
+     */
+    #[ReturnTypeWillChange]
+    public function offsetSet($offset, $value)
+    {
+        $this->attributes[$offset] = $value;
+    }
+
+    /**
+     * @todo Add void return type when Stud.IP requires PHP8 minimal
+     */
+    #[ReturnTypeWillChange]
+    public function offsetUnset($offset)
+    {
+        unset($this->attributes[$offset]);
+    }
+}